1 files changed, 0 insertions, 51 deletions
diff --git a/src/float_ex.rs b/src/float_ex.rs
deleted file mode 100644
index 70f382a..0000000
--- a/src/float_ex.rs
+++ /dev/null
@@ -1,51 +0,0 @@
-#[cfg(feature = "libm")]
-#[allow(unused_imports)]
-use num_traits::Float;
-
-pub(crate) trait FloatEx {
-    /// Returns a very close approximation of `self.clamp(-1.0, 1.0).acos()`.
-    fn acos_approx(self) -> Self;
-}
-
-impl FloatEx for f32 {
-    #[inline(always)]
-    fn acos_approx(self) -> Self {
-        // Based on https://github.com/microsoft/DirectXMath `XMScalarAcos`
-        // Clamp input to [-1,1].
-        let nonnegative = self >= 0.0;
-        let x = self.abs();
-        let mut omx = 1.0 - x;
-        if omx < 0.0 {
-            omx = 0.0;
-        }
-        let root = omx.sqrt();
-
-        // 7-degree minimax approximation
-        #[allow(clippy::approx_constant)]
-        let mut result = ((((((-0.001_262_491_1 * x + 0.006_670_09) * x - 0.017_088_126) * x
-            + 0.030_891_88)
-            * x
-            - 0.050_174_303)
-            * x
-            + 0.088_978_99)
-            * x
-            - 0.214_598_8)
-            * x
-            + 1.570_796_3;
-        result *= root;
-
-        // acos(x) = pi - acos(-x) when x < 0
-        if nonnegative {
-            result
-        } else {
-            core::f32::consts::PI - result
-        }
-    }
-}
-
-impl FloatEx for f64 {
-    #[inline(always)]
-    fn acos_approx(self) -> Self {
-        f64::acos(self.clamp(-1.0, 1.0))
-    }
-}